linux-kernel - Re: [PATCH] selftests/mount_setattr: Remove redefinition of struct mount

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Date:   Sun, 1 Jan 2023 22:13:14 +0530
From:   Siddh Raman Pant <code@...dh.me>
To:     Christian Brauner <brauner@...nel.org>,
        Seth Forshee <sforshee@...nel.org>,
        Shuah Khan <shuah@...nel.org>
Cc:     linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linux-kselftests <linux-kselftest@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] selftests/mount_setattr: Remove redefinition of struct
 mount_attr

On Sun, 11 Dec 2022 14:58:20 +0530, Siddh Raman Pant wrote:
> It is already included via sys/mount.h on line 10.
> 
> GCC error reproducible by: make kselftest TARGETS="mount_setattr"
> 
> mount_setattr_test.c:107:8: error: redefinition of ‘struct mount_attr’
>   107 | struct mount_attr {
>       |        ^~~~~~~~~~
> In file included from /usr/include/x86_64-linux-gnu/sys/mount.h:32,
>                  from mount_setattr_test.c:10:
> ../../../../usr/include/linux/mount.h:129:8: note: originally defined here
>   129 | struct mount_attr {
>       |        ^~~~~~~~~~
> 
> Signed-off-by: Siddh Raman Pant <code@...dh.me>
> ---
>  tools/testing/selftests/mount_setattr/mount_setattr_test.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index 8c5fea68ae67..582669ca38e9 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -103,13 +103,6 @@
>   #else
>     #define __NR_mount_setattr 442
>   #endif
> -
> -struct mount_attr {
> - __u64 attr_set;
> - __u64 attr_clr;
> - __u64 propagation;
> - __u64 userns_fd;
> -};
>  #endif
 > 
>  #ifndef __NR_open_tree
> -- 
> 2.35.1

Hi,

Please review the above patch, which can be found on the link below:
https://lore.kernel.org/all/20221211092820.85527-1-code@siddh.me

This was encountered before the patch adding missing <sys/syscall.h>
was applied, which just means that I went into the code path under
#ifndef __NR_mount_setattr, and encountered the error.

Thanks,
Siddh